CBS announced today that it has renewed NCIS, the #1 television drama series in the U.S. and worldwide, for two more seasons, and that series star and executive producer Mark Harmon has signed a new two-year deal.

“It’s extraordinary that in its 13th season and with over 300 episodes to its credit, NCIS continues to excel at such a high level on a global scale,” said Glenn Geller, President, CBS Entertainment. “It is testimony to an amazing cast, led on and off the screen by the exceptional Mark Harmon, for skillfully bringing this universally appealing team of heroes to life; and to Gary Glasberg and his writers for crafting compelling stories that feature NCIS’s signature blend of mystery, quirk, drama and comedy every single week.”

Currently in its 13th season, NCIS is a member of the exclusive 20 million viewer club. The drama is averaging 20.47 million viewers, up +4% from a year ago and on pace to finish the season as network television’s #1 drama for the seventh consecutive year. In key demographics, NCIS ranks in the top 10 among adults 25-54, averaging 4.6/13, and is in the top 15 in adults 18-49, averaging 3.1/10. Also, NCIS ranks in the top 10 among time-shifted programs, gaining nearly +4 million viewers with 7-day playback.

NCIS is also an international hit, licensed in more than 200 markets. For the past two years, it has been awarded the International Audience Award by Eurodata TV Worldwide and The Monte Carlo Television Festival for being “the most watched drama series in the world.” It is a top performing U.S. series in Canada, France, Germany, Italy, Poland, Spain, Sweden and in the UK, among other countries.

NCIS premiered on CBS in 2003. During the 2009-2010 season, it became the #1 drama/scripted program on television, and has remained the #1 drama ever since.